Around 1996 at Southern Illinois University, I was taking a cytogenetics class and the subject of parthenogenesis (or virgin birth) came up as a phenomenon observed in nature. I approached the professor after the session and we exchanged some ideas on this subject. He told me something like if the virgin birth described in the Bible was real, it could be the first and only documented case of parthenogenesis in humans.

Here is a link to a recent article from BBC that explores the extent to which parthenogenesis occurs in nature: